SSD AHCI Mode Help?

Hello, I am planning to buy a Crucial M4 SSD 256GB SSD and I have a HP Dv7 1245ca and it might support TRIM, it might not...but anyway, i entered the BIOS and there isn't a SATA section, there is no way to change it. I've checked online and it said that HP BIOS does't support changing to AHCI. Many people want to modify the BIOS but recommend against it. Is there anyway to set the SATA port to AHCI mode using any other method? I have 2 HDD bays in the laptop so yea... In Device Manager, under IDE ATA/ATAPI controllers, it has ATA channel 0-5 and Standard AHCI 1.0 Serial ATA Controller, and Standard Dual Channel PCI IDE Controller. Please help.
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More about ahci mode help
  1. It is the OS that has to support Trim (win7). I would not worry to much about the mode but it has a SATA drive already which should be running ACHI.
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